Personally, I see nothing wrong with being able to revolt a region when 10k gold is used to do so, regardless of prior conditions.
I do.
If I'm lord of a city region, I'd like to be able to be given a chance to stop it at least. Perhaps a 1 turn warning.
Something like drop all of the control and loyalty stats to nothing, but still give the lord a chance to prevent it (OR to pay off the rebels to prevent it) in some manner. Otherwise, it is kind of dumb.